Powershell 格式 FTPS 列表输出以获取最新文件戳

【问题标题】：Powershell format FTPS list output to get newest file stampPowershell 格式 FTPS 列表输出以获取最新文件戳
【发布时间】：2017-10-01 14:38:08
【问题描述】：

为了监控写入远程 FTPS 服务器的备份，我能够在 Powershell 中从服务器请求文件列表。 但是，我不确定如何处理输出，以便从最新文件中获取时间戳。

也许有更好的方法，但这是我目前的代码，输出如下。

# Create an FTPWebRequest object to handle the connection to the FTP server
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups"
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)

# Set the request's network credentials for an authenticated connection
$username = "admin" #Change username when done
$password = "xxx"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)

[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False

$ftpresponse = $ftprequest.GetResponse()

#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription


$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream() 
    $reader.ReadToEnd()
    $reader.Close()

echo $reader

输出：

-rw-rw-rw-   1 admin    users       137233604 Sep 30 13:41  OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-30 13;36;52 (Full).zip
-rw-rw-rw-   1 admin    users       138556255 Sep 30 19:48  OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-30 19;36;18 (Full).zip
-rw-rw-rw-   1 admin    users       139217601 Oct  1 00:12  OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-10-01 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       698303741 Sep  3 00:05 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-03 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       699470009 Sep  4 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-04 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       700639919 Sep  5 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-05 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       698361150 Sep  6 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-06 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       699553508 Sep  7 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-07 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       700758345 Sep  8 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-08 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       698512347 Sep  9 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-09 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       699752013 Sep 10 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-10 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       701003563 Sep 11 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-11 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       698883380 Sep 12 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-12 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       700251730 Sep 13 00:06 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-13 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       701612056 Sep 14 00:08 HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-14 00;00;04 (Full).zip
-rwxrwxrwx   1 admin    users              79 Sep 14 00:15 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-14 00;14;59 (Full).zip
-rwxrwxrwx   1 admin    users       137231884 Sep 14 07:38 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-14 07;35;22 (Full).zip
-rwxrwxrwx   1 admin    users       138496696 Sep 14 14:59 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-14 14;55;24 (Full).zip
-rwxrwxrwx   1 admin    users       136790964 Sep 15 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-15 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       138052042 Sep 16 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-16 00;00;04 (Full).zip
-rwxrwxrwx   1 admin    users       139355293 Sep 17 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-17 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       137115162 Sep 18 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-18 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       138536791 Sep 19 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-19 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       139959405 Sep 20 00:04 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-20 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       137663847 Sep 21 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-21 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       138945285 Sep 22 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-22 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       140230350 Sep 23 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-23 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       137699171 Sep 24 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-24 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       138988930 Sep 25 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-25 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       140287732 Sep 26 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-26 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       137764807 Sep 27 00:04 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-27 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       139063256 Sep 28 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-28 00;00;03 (Full).zip
-rwxrwxrwx   1 admin    users       140365349 Sep 29 00:03 OpenVPN + HTDOCS + Apache conf+  exported databases backup to NAS01 2017-09-29 00;00;03 (Full).zip


CurrentEncoding BaseStream EndOfStream
--------------- ---------- -----------

一个或多个连续空格可以用作分隔符，这将导致日期位于第 6（月）、第 7（天）和第 8（时间）列，但我不知道该怎么做，我不知道'不认为这是最好的解决方案，因为它会在输出更改时立即中断。

有什么想法吗？我真的只需要最新文件的日期时间戳，这样我就可以计算自上次备份以来的时间。以数组形式获取输出会更好，因为我将来可以将脚本用于其他目的。

希望你能帮助我。

-杰森

【问题讨论】：

    标签： list powershell format output ftps


    【解决方案1】：

    试试String.Split method

    $reader.Split([char[]]"`n") |
ForEach-Object {, $_.Split([char[]]$null, [StringSplitOptions]::RemoveEmptyEntries)} |
ForEach-Object {"$($_[5..7])"}

    可以通过正则表达式实现更多控制

    $reader |
Select-String '\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|Sep)\s(\d\d)\s(\d\d:\d\d)\s' -AllMatches |
ForEach-Object {$_.Matches} |
ForEach-Object {, ($_.Groups[1..3] | Select-Object -ExpandProperty Value)} |
ForEach-Object {$_[0] + ' ' + $_[1] + ' ' + $_[2]}

    【讨论】：

      【解决方案2】：

      编辑：Andrei Odegov 用新的正则表达式更新了他们的解决方案，所以我想提供基于该解决方案的变体，而不是我之前的答案。

      一旦您拥有$dirlist，您似乎正在采取一些您可能不需要的额外步骤来达到您的目的。请尝试以下方法：

      # Create an FTPWebRequest object to handle the connection to the FTP server
clear
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups"
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)

# Set the request's network credentials for an authenticated connection
$username = "admin" #Change username when done
$password = "xxx"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)

[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False

Remove-Variable ftpresponse
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription

Remove-Variable reader
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream() 
    $dirlist = $reader.ReadToEnd()
    $reader.Close()

echo "raw output:"
$dirlist

$dateArray = $dirlist | Select-String -Pattern "((?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec|Sep)\s(s|\d)\d\s\d{2}:\d{2})" | % {$_.Matches} |  % {[datetime]::parseexact($_.Value, 'MMM dd HH:mm', $null)} | Sort-Object

echo "DateTime Sorted:"
$dateArray

echo "Last file:"
$dateArray[-1]

      Select-String 的结果可以在管道中转换为[DateTime]，也可以使用Sort-Object 在同一管道中排序，默认情况下按升序排序。

      一旦您到达 Last 文件，$array[-1] 将返回数组中的最后一项，无需获取长度即可实现此目的。

      【讨论】：

        【解决方案3】：

        在摆弄 Select 之后，我放弃了并尝试了另一种方法。 （我不断收到关于正则表达式不正确的错误..）

        使用 Andrei Odegov 的 sn-p，我拆分了 $dirlist 并从文件名中选择了日期和时间，而不是实际的修改日期。为此，我删除了一些较旧的备份，以便所有文件的日期和时间都在第 19 和第 20 个对象上。此日期包括可能防止超过一年的文件出现问题的年份。

        然后我把这些日期处理成$dateArray，排序，最后得到了一个不错的结果！

        以下是最终代码，因为此脚本的目的是获取自上次备份到我的 PRTG 网络监视器的时间（以分钟为单位），所以我也包含了该代码。

        # Create an FTPWebRequest object to handle the connection to the FTP server
clear
$sourceuri = "ftp://192.168.1.4/ROOT/CobianBackups" #Full path to folder
$ftprequest = [System.Net.FtpWebRequest]::Create($sourceuri)

# Set the request's network credentials for an authenticated connection
$username = "username"
$password = "password"
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($username,$password)

[System.Net.ServicePointManager]::ServerCertificateValidationCallback = { return $true } #ignore unsigned SSL cert, UNSECURE! Get signed SSL
# Set FTPWebRequest method to ListDirectory
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::ListDirectoryDetails
$ftprequest.EnableSsl = $True
$ftprequest.UseBinary = $False
$ftprequest.UsePassive = $True
$ftprequest.KeepAlive = $False

Remove-Variable ftpresponse
$ftpresponse = $ftprequest.GetResponse()
#Write-Host $ftpresponse.StatusCode
#Write-Host $ftpresponse.StatusDescription

Remove-Variable reader
$reader = New-Object IO.StreamReader $ftpresponse.GetResponseStream() 
    $dirlist = $reader.ReadToEnd()
    $reader.Close()

Remove-Variable rawdates
$rawdates = $dirlist.Split([char[]]"`n") |
ForEach-Object {, $_.Split([char[]]$null, [StringSplitOptions]::RemoveEmptyEntries)} |
ForEach-Object {"$($_[19..20])"}


Remove-Variable dateArray
foreach ($element in $rawdates){
$date = [datetime]::parseexact($element, 'yyyy-MM-dd HH;mm;ss', $null)
[DateTime[]]$dateArray += $date
}

[Array]::Sort($dateArray)

$dateArray[-1]
$DateNow = Get-Date
$DateDif = $DateNow - $dateArray[-1]
$DateDif.TotalMinutes

#Final output to PRTG (write-host VALUE:MESSAGE)
write-host $DateDif.TotalMinutes: Last backup executed at $dateArray[-1] which is ($DateDif.Days) days, ($DateDif.Hours) hours, ($DateDif.Minutes) minutes ago

        感谢大家的贡献！

        -杰森

        【讨论】：

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